UREDINACEAE 423 



more or less covering the outer surface of cone scales ; 

 spores oblong-polyhedric, about 24-33X18-22 /x, warted, 

 areolate, orange-yellow. 



Peridermium elatinum, Kze. and Schw., D. Schw., 

 No. 142. Spermogonia immersed, conoidly prominent, 

 honey-colour; aecidia hypophyllous, in 1-2 rows, white, 

 irregularly torn ; spores elliptic or polygonal, 16-30 X 14-17 

 /A, epispore hyaline, coarsely warted, contents orange. 



Uredo, Pers. Sori generally orange-yellow, subpul- 

 verulent, superficial or erumpent, pseudoperidium absent ; 

 uredospores formed singly at the tips of fertile hyphae. 



Uredo vitis, Thiim., Die Pilze des Weinstockes, p. 182. 

 Sori hypophyllous, usually minute and more or less 

 crowded, bright yellow, -resembling minute aecidia under a 

 lens, due to the elevated margin composed of paraphyses ; 

 spores piriform or broadly elliptical ; epispore thin, minutely 

 verruculose, colourless, contents orange-yellow, i8-3ox 

 15-18 ft', paraphyses colourless, cylindrical, slightly curved, 

 33-35 X 7-9 (* 



Uredo cannae, Wint, Hedw., 1884, p. 172. Sori 

 generally hypophyllous, rarely also epiphyllous, without 

 spots, either densely scattered over the entire surface,' or 

 collected in groups, minute, pale yellow, for a long time 

 covered by the epidermis; spores variable in form, 

 yellowish, echinulate, 25-45x16-23 //,. 



SPHAEROPSIDIACEAE 



Fungi with perithecia containing conidia borne at the 

 tips of slender conidiophores ; asci absent. 



Probably representing phases in the life-cycle of asciger- 

 ous fungi. 



